Yamaha YFM250XL(C) Service Manual page 10

TIMING CHAIN ................................................................................... 4-30
CAM SPROCKET AND CAM DRIVE SPROCKET ............................... 4-31
TIMING CHAIN GUIDE ....................................................................... 4-31
TIMING CHAIN TENSIONER .............................................................. 4-31
TAPPET COVER AND CAM SPROCKET COVER ............................... 4-32
CYLINDER AND PISTON .................................................................... 4-32
PISTON RING AND PISTON PIN ....................................................... 4-33
CRANKSHAFT ..................................................................................... 4-36
BALANCER DRIVE GEAR AND DRIVEN GEARS .............................. 4-37
PRIMARY GEARS AND STARTER ..................................................... 4-37
PRIMARY CLUTCH ............................................................................. 4-38
SECONDARY CLUTCH ....................................................................... 4-38
OIL PUMP ............................................................................................ 4-40
TRANSMISSION AND SHIFTER ........................................................ 4-41
MIDDLE GEAR .................................................................................... 4-43
BEARINGS AND OIL SEALS .............................................................. 4-43
CIRCLIPS AND WASHERS ................................................................. 4-43
CRANKCASE ....................................................................................... 4-43
RECOIL STARTER ............................................................................... 4-44
ENGINE ASSEMBLY AND ADJUSTMENT ............................................... 4-45
RECOIL STARTER ............................................................................... 4-45
CRANKSHAFT/BALANCER ................................................................ 4-47
TRANSMISSION ................................................................................. 4-48
SHIFTER .............................................................................................. 4-49
CRANKSHAFT, TRANSMISSION AND BALANCER SHAFT ............ 4-50
CRANKCASE (LEFT) ........................................................................... 4-51
BALANCER DRIVEN AND DRIVE GEARS ......................................... 4-51
SHIFT SHAFT/OIL PUMP .................................................................... 4-53
SHIFTER AND OIL PUMP ................................................................... 4-54
CLUTCH ............................................................................................... 4-56
PRIMARY AND SECONDARY CLUTCHES ........................................ 4-57
MIDDLE DRIVEN PINION GEAR ........................................................ 4-61
STARTER PULLEY (EXCEPT FOR USA)/CDI MAGNETO ................. 4-62
STARTER PULLEY (EXCEPT FOR USA) AND CDI MAGNETO ........ 4-63
CYLINDER AND CYLINDER HEAD ASSEMBLY ................................ 4-65
PISTON, CAMSHAFT AND TIMING CHAIN ...................................... 4-66
CYLINDER HEAD ASSEMBLY, CYLINDER AND PISTON ................ 4-67
REMOUNTING ENGINE ..................................................................... 4-72
GEN
1
INFO
2
SPEC
INSP
3
ADJ
4
ENG
5
CARB
6
DRIVE
7
CHAS
- +
8
ELEC
TRBL
9
SHTG